Chapter 17. Dynamic routing - OSPF and BGP

Once your network starts to get really big, or you start to consider 'the
internet' as your network, you need tools which dynamically route your data.
Sites are often connected to each other with multiple links, and more are
popping up all the time.

The Internet has mostly standardized on OSPF and BGP4 (rfc1771).
Linux supports both, by way of gated and
zebra

While currently not within the scope of this document, we would like to
point you to the definitive works: